William e



(No Model.)

BLOWNG ENGINE. No. 511,013. @man1-,601100. 10, 100s.

l J. 2E@ I 4 m w 4M m N Y A Q l/ l I, W 1 A MM M m s, d 5 d w o o o. o o

UNITED STATES PATENT Fries.

WILLIAM E. GOGD, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR. TO THE SOUTHVVARK FOUNDRY AND MACHINE COMPANY, OF SAME PLACE.

BLOWlNG-ENGINE.

SPECIFICATION forming part of Letters Patent No. 511,013, dated December 19, 1893.

Application liled July I3, 1892. Serial No, 439.873. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM E. GOOD, ot' the city and county of Philadelphia, State of Pennsylvania, have invented a certain new and useful Improvement in Blowing-Engines,

of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part of this specification.

1o My invention relates to blowingor compressing engines and has for its object to provide improved mechanism for actuating the discharge valves of such engines.

The nature of myimprovement will be best understood as described in connection with the drawings in which it is illustrated and in which- Figure l is a sectional plan view taken on the line 3-4 of Fig. 2 showing a part of the 2o head of a blowing engine with its discharge valve and valve actuating devices. Fig. 2 is a sectional elevation of the same parts taken on the line 1"-2 of Fig. Il; and Fig. 3 is asectional View taken on the' line 5-6 of Fig. l

showing the communicating passage between the tub and the valve actuating mechanism.

A indicates the main cylinder of the compressor. A' indicates the head of this cylinder and is perforated with a number of slots 3o as indicated at B B, dac. I

C is a portion of the receiver of the engine.

E indicates the discharge valve of the engine which is of the gridiron type working over the slots B and is provided with a valve spindle F which extends through the receiver into an auxiliary cylinder, and is attached to apiston O working in said cylinder. Thel cylinder G is connected at one end with the interior of the compressing cylinder, the con- 4o nectlon in the plan shown being through a port K leading into a chamber I which communicates with the cylinder through a passage J; this connection is such that the air forced from the cylinder by the motion of the piston S will on entering the cylinder G act upon the piston O in such a manner as to tend to open the valve. A port or ports G is formed in the rear of cylinder G to permit the escape of air from behind the piston. I pre- 5o fer to make these ports some distance in front of the rear of the cylinder so that a volume of air situated behind them will act as a cushion to the pistou O checking its motion and that of the attached discharge valve and preventing injury to the cylinder or piston.

I eect the closing of the discharge valve by means of a connection with asteam boiler or other sources of approximately constant pressure acting upon the piston O ora piston connected or attached thereto in the opposite 6o direction to the action of the air from the main cylinder. Thus in the plan shown, the piston O is provided with Va plunger extension P which works in an extension H of the cylinder G, this portion II of the cylinder 6 5 being connected with the boiler in the plan shown through `a port N communicating with the chamber I which chamber is in turn in communication with a boiler or other source of constant pressure (not shown) through a 7o passage M and any convenient conduits.

To the extent above described the construction of my improved blowing engine is similar to the one devised by Thomas James, of Braddock, Pennsylvania, and described in a patent granted to his assignee, The Southwark Foundry and Machine Company, butin said James engine the connection with the boiler or other sources of constant pressure is permanent, and the leading feature of my 8o improvement consists in providing avalvein the conduit leading from the boiler or other source of constant pressure to the cylinder, by which the said boiler and cylinder are connected when it is desired to close the discharge valve, and disconnected at the time when the discharge valve is to be opened. Such a valve is indicated at Q,and it is actuated through a valve stem or by any convenient attachment to moving parts ot the engine. In con 9e nection with this valve I prefer also to employ an exhaust port as indicated at L and with which the cylinder H is connected by the movement of valve Q after the connection with the boiler has been closed. I prefer also to employ a valve Q acting to alternately open and close the connection between the cylinder Gr and the compressing cylinder. This valve is most conveniently attached to the same spindle as the valve Q' icc in the plan shown, the two valves constituting a compound valve both working in the chamber I, the valves being set so that the port of cylinder G will connect with the exhaust of cylinder L permitting the air in cylinder G to escape While the boiler is in connection with the cylinder H.

In order to take up the momentum of the Valve in closing I prefer to form a port K leading into the cylinder Gsornewhat behind port K, and I form Valve Q of such breadth that when it closes port K to the tub connection it will open port K to the exhaust. In this Way a cushion is formed in advance of port K which serves to check the motion of the Valve in closing. r

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a blowing engine or compressor the combination with the compressing cylinder of a discharge valve, means for opening said valve actuated by the air in the compressing cylinder as described, means for closing said discharge Valve actuated by fluid from a boiler or other source of constant pressure and a valve operating as specified to alternately open and close the boiler connection.

2. In a blowing engine or compressor the combination with the compressing cylinder, of a discharge Valve, an auxiliary cylinder G connected at one end with the main cylinder, a piston working in said auxiliary cylinder and connected with the discharge valve, said parts being arranged so that the air forced into the cylinder from the'compressing cylinder will tend to open the valve, a connection from the auxiliary cylinder to a boiler or other source of constant pressure and to an exhaust, and avalve controlling said last mentioned connection so as to alternately connect the cylinder with the boiler and the exhaust.

3. In a blowing engine or compressor the combination with the compressing cylinder, of a discharge valve, an auxiliary cylinder G connected at one end with the main cylinder,

-a piston working in said auxiliary cylinder into the cylinder from the compressing cylinder will tend to open the valve, a connection from the auxiliary cylinder to a boiler, and a valve or Valves arranged to close the oonnection with the compressing cylinder and open the connection with the boiler, or open the connection with the compressing cylinder and close the connection with the boiler or other source of constant pressure as described.

4.-. In a blowing engine or compressor the combination with the compressing cylinder, of a discharge valve, an auxiliary cylinder G connected at one end with the main cylinder, a piston working in said auxiliary cylinder and connected with the discharge valve, said parts being arranged so that the air forced into the cylinder from the compressing cylinder will tend to open the valve, a connection from the auxiliary cylinder to the boiler and to an exhaust, and a valve or valves arranged to close the communication with the compressing cylinder and open the communicat-ion with the boiler, or open the communication with the compressing cylinder and close the communication with the boiler or other source of constant pressure, said Valves also being arranged to connect the cylinder with the exhaust at either or both ends.

5. In a blowing engine or compressor the combination with the compressing cylinder of a discharge valve,an auxiliary cylinder G,

a chamber I connecting the main cylinder with a source of constant pressure and with an exhaust, a port K leading from the end of cylinder G to chamber I, a port K situated behind port K also connecting with the cylinder and chamber, a port N leading from chamber I to the rear of cylinder G, and valves Q Q arranged and operated as described to alternately connect ports K with the compression cylinder and port N with the source of constant pressure and also to alternately Y connect ports N and K with the exhaust.

WV. E. GOOD. Witnesses:

H. V. ToMLINsoN, LEWIS R. DICK. 

